Electrochemical removal of amoxicillin using a Cu doped PbO2 electrode: Electrode characterization, operational parameters optimization and degradation mechanism.
Chemosphere
; 233: 762-770, 2019 Oct.
Article
em En
| MEDLINE
| ID: mdl-31200136
ABSTRACT
This work investigated the electrochemical degradation of amoxicillin (AMX) in aqueous solution with Cu-PbO2 electrode. The main inï¬uence factors on the degradation of AMX, such as Na2SO4 concentration, initial AMX concentration, current density and initial pH value, were analyzed in detail. Under the optimal conditions, the removal rates of AMX and chemical oxygen demand (COD) reached 99.4% and 46.3% after 150â¯min treatment. The results indicated that the electrochemical degradation of AMX ï¬tted pseudo-ï¬rst-order reaction kinetics. Compared with undoped PbO2 electrode, Cu-PbO2 electrode had a smaller crystal size, more proportion of hydroxyl oxygen species, greater AMX and chemical oxygen demand (COD) removal efficiency, higher average current efï¬ciency (ACE) and lower electrical efï¬ciency per log order (EE/O). Electrochemical oxidation using Cu-PbO2 electrodes was an effective way to eliminate amoxicillin in aqueous solution. Moreover, a possible degradation pathway including ring open and mineralization was proposed by intermediate products determined by GC-MS method. This paper could provide basic data and technique reference for the amoxicillin wastewater pollution control.
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MEDLINE
Assunto principal:
Poluentes Químicos da Água
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Eliminação de Resíduos Líquidos
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Eletrodos
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Amoxicilina
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article